2 heads = 1 kilograms (approx)
Iceberg is the king of crunch in the lettuce family, with a little sweet snap in every bite. Crisp and cool, with the oomph to stand up to the biggest burger without wilting.
It also contains traces of sodium, copper, and zinc. Iceberg lettuce is an excellent source of vitamin A,vitamin K, and vitamin C. It is also a good source of thiamin, vitamin B6, and folate (vitamin B9). Iceberg lettuce contains 14 calories per 100 grams. It mainly contains water and dietary fiber